The correct option is C The first rays of the sun fall directly on the idol
Modhera Sun temple is located at Modhera village of Mehsana district, Gujarat, India on the bank of river Pushpavati. It is a Hindu temple built by Bhimdev I of the Solanki dynasty in 1026AD and dedicated to the Sun. The sanctum sanctorum is designed in a way that the first rays of rising sun lit up the image of Surya during solar equinox days.